公开(公告)号：US07467546B2

公开(公告)日：2008-12-23

申请号：US11336936

申请日：2006-01-23

申请人： Shinya Igarashi ,  Hiroshi Kikawa ,  Yasuhiro Asano ,  Naoki Saito

发明人： Shinya Igarashi ,  Hiroshi Kikawa ,  Yasuhiro Asano ,  Naoki Saito

IPC分类号： G01F1/68

CPC分类号： G01F1/6842

摘要： In a flow sensor, detecting elements are provided at a sub-passage. A sub-passage wall contains a hole to drain accumulated liquid. A protrusion arranged close to the hole on an external surface generates dynamic pressure on the opening in response to external flow. Alternatively, a protrusion upstream from the hole on the inner wall surface produces a separation flow area for separating the flow from the internal surface near the hole, whereby pressure in the separation area is reduced and almost the same pressure differences on the internal and external surfaces openings result. This reduces leakage from the hole and changes in the distribution flow in the sub-passage between cases where the hole is blocked and not blocked, thus minimizing flow measurement errors. Structure may be provided close to the external surface hole opening to prevent a liquid film or drop from being formed on the opening by surface tension.

摘要翻译： 在流量传感器中，检测元件设置在子通道处。 子通道壁包含一个排出积聚液体的孔。 靠近外表面上的孔布置的突起响应于外部流动而在开口上产生动态压力。 或者，在内壁表面上的孔的上游突出产生分离流动区域，用于从孔附近的内表面分离流动，从而分离区域中的压力降低，并且在内表面和外表面上几乎相同的压力差 开场结果。 这样可以减少孔中的泄漏，并且在孔被阻塞并且不被堵塞的情况下，子通道中的分配流量的变化，从而最小化流量测量误差。 结构可以设置在靠近外表面孔开口处，以防止通过表面张力在开口处形成液体膜或液滴。

公开(公告)号：US07004022B2

公开(公告)日：2006-02-28

申请号：US10484075

申请日：2001-12-17

申请人： Sinya Igarashi ,  Hiroshi Kikawa ,  Yasuhiro Asano ,  Naoki Saito

发明人： Sinya Igarashi ,  Hiroshi Kikawa ,  Yasuhiro Asano ,  Naoki Saito

IPC分类号： G01F1/68

CPC分类号： G01F1/6842 ,  G01F5/00 ,  G01F15/12

摘要： The flow detecting elements are provided at the sub-passage for making the part of fluid to be measured (gas) flow. The wall of the sub-passage contains a leak hole (through hole) to drain a liquid having entered and accumulated inside the sub-passage. A protrusion for generating a dynamic pressure on the opening is arranged close to the opening of the leak hole on the external surface of the sub-passage. Alternatively, a protrusion located upstream from the leak hole is formed on the inner wall surface of the sub-passage. The former protrusion generates a dynamic pressure in response to the flow velocity of the gas flowing along the external surface of the sub-passage. The latter protrusion produces a separation flow area for separating the flow from the internal surface of the sub-passage (close to the leak hole), whereby the pressure of the separation floe area is reduced. This configuration provides almost the same pressure differences on the openings of the internal and external surfaces of the sub-passage, thereby reducing the amount of gas leaked from the leak hole. This reduces changes in the distribution flow velocity in the sub-passage between the cases where the leak hole is blocked and where not blocked, and minimizes flow measurement errors.Further, to prevent a liquid film or drop from being formed on the opening by surface tension, structural means is provided close to the opening of the leak hole on the external surface of the sub-passage.

摘要翻译： 流量检测元件设置在子通道处，用于使待测流体的一部分（气体）流动。 子通道的壁包含泄漏孔（通孔），以排出进入并积聚在子通道内的液体。 用于在开口上产生动压的突起设置在靠近子通道外表面上的泄漏孔的开口处。 或者，位于上述泄漏孔上游的突起形成在上述通路的内壁面上。 前一个突起响应于沿着子通道的外表面流动的气体的流速而产生动态压力。 后者的突起产生用于将流体从分通道的内表面（靠近泄漏孔）分离的分离流动区域，从而降低了分离絮区的压力。 这种构造在子通道的内表面和外表面的开口上提供几乎相同的压力差，从而减少从泄漏孔泄漏的气体量。 这可以减少泄漏孔被阻塞的情况和未被阻塞的情况下的子通道中的分布流速的变化，并且最小化流量测量误差。

公开(公告)号：US20090133489A1

公开(公告)日：2009-05-28

申请号：US12341426

申请日：2008-12-22

申请人： Shinya IGARASHI ,  Hiroshi KIKAWA ,  Yasuhiro ASANO ,  Naoki SAITO

发明人： Shinya IGARASHI ,  Hiroshi KIKAWA ,  Yasuhiro ASANO ,  Naoki SAITO

IPC分类号： G01F1/68

CPC分类号： G01F1/6842 ,  G01F5/00 ,  G01F15/12

摘要： In a flow sensor, detecting elements are provided at a sub-passage. A sub-passage wall contains a hole to drain accumulated liquid. A protrusion arranged close to the hole on an external surface generates dynamic pressure on the opening in response to external flow. Alternatively, a protrusion upstream from the hole on the inner wall surface produces a separation flow area for separating the flow from the internal surface near the hole, whereby pressure in the separation area is reduced and almost the same pressure differences on the internal and external surfaces openings result. This reduces leakage from the hole and changes in the distribution flow in the sub-passage between cases where the hole is blocked and not blocked, thus minimizing flow measurement errors. Structure may be provided close to the external surface hole opening to prevent a liquid film or drop from being formed on the opening by surface tension.

摘要翻译： 在流量传感器中，检测元件设置在子通道处。 子通道壁包含一个排出积聚液体的孔。 靠近外表面上的孔布置的突起响应于外部流动而在开口上产生动态压力。 或者，在内壁表面上的孔的上游突出产生分离流动区域，用于将流体与孔附近的内表面分离，从而分离区域中的压力降低，内表面和外表面上几乎相同的压力差 开场结果。 这样可以减少孔中的泄漏，并且在孔被阻塞并且不被堵塞的情况下，子通道中的分配流量的变化，从而最小化流量测量误差。 结构可以设置在靠近外表面孔开口处，以防止通过表面张力在开口处形成液体膜或液滴。

公开(公告)号：US20060156808A1

公开(公告)日：2006-07-20

申请号：US11336936

申请日：2006-01-23

申请人： Sinya Igarashi ,  Hiroshi Kikawa ,  Yasuhiro Asano ,  Naoki Saito

发明人： Sinya Igarashi ,  Hiroshi Kikawa ,  Yasuhiro Asano ,  Naoki Saito

IPC分类号： G01F1/68

CPC分类号： G01F1/6842

摘要： In a flow sensor, detecting elements are provided at a sub-passage. A sub-passage wall contains a hole to drain accumulated liquid. A protrusion arranged close to the hole on an external surface generates dynamic pressure on the opening in response to external flow. Alternatively, a protrusion upstream from the hole on the inner wall surface produces a separation flow area for separating the flow from the internal surface near the hole, whereby pressure in the separation area is reduced and almost the same pressure differences on the internal and external surfaces openings result. This reduces leakage from the hole and changes in the distribution flow in the sub-passage between cases where the hole is blocked and not blocked, thus minimizing flow measurement errors. Structure may be provided close to the external surface hole opening to prevent a liquid film or drop from being formed on the opening by surface tension.

摘要翻译： 在流量传感器中，检测元件设置在子通道处。 子通道壁包含一个排出积聚液体的孔。 靠近外表面上的孔布置的突起响应于外部流动而在开口上产生动态压力。 或者，在内壁表面上的孔的上游突出产生分离流动区域，用于从孔附近的内表面分离流动，从而分离区域中的压力降低，并且在内表面和外表面上几乎相同的压力差 开场结果。 这样可以减少孔中的泄漏，并且在孔被阻塞并且不被堵塞的情况下，子通道中的分配流量的变化，从而最小化流量测量误差。 结构可以设置在靠近外表面孔开口处，以防止通过表面张力在开口处形成液体膜或液滴。

公开(公告)号：US07752908B2

公开(公告)日：2010-07-13

申请号：US12341426

申请日：2008-12-22

申请人： Shinya Igarashi ,  Hiroshi Kikawa ,  Yasuhiro Asano ,  Naoki Saito

发明人： Shinya Igarashi ,  Hiroshi Kikawa ,  Yasuhiro Asano ,  Naoki Saito

IPC分类号： G01F1/68

CPC分类号： G01F1/6842 ,  G01F5/00 ,  G01F15/12

摘要： In a flow sensor, detecting elements are provided at a sub-passage. A sub-passage wall contains a hole to drain accumulated liquid. A protrusion arranged close to the hole on an external surface generates dynamic pressure on the opening in response to external flow. Alternatively, a protrusion upstream from the hole on the inner wall surface produces a separation flow area for separating the flow from the internal surface near the hole, whereby pressure in the separation area is reduced and almost the same pressure differences on the internal and external surfaces openings result. This reduces leakage from the hole and changes in the distribution flow in the sub-passage between cases where the hole is blocked and not blocked, thus minimizing flow measurement errors. Structure may be provided close to the external surface hole opening to prevent a liquid film or drop from being formed on the opening by surface tension.

摘要翻译： 在流量传感器中，检测元件设置在子通道处。 子通道壁包含一个排出积聚液体的孔。 靠近外表面上的孔布置的突起响应于外部流动而在开口上产生动态压力。 或者，在内壁表面上的孔的上游突出产生分离流动区域，用于从孔附近的内表面分离流动，从而分离区域中的压力降低，并且在内表面和外表面上几乎相同的压力差 开场结果。 这样可以减少孔中的泄漏，并且在孔被阻塞并且不被堵塞的情况下，子通道中的分配流量的变化，从而最小化流量测量误差。 结构可以设置在靠近外表面孔开口处，以防止通过表面张力在开口处形成液体膜或液滴。